JUNCTEK KH-F Series User manual

JUNCTEK

JUNCTEK
KH-F series coulometer
Shunt Sampling
User’s Manual
Rev1.0 March 2023
(The pictures in the manual are for reference only)

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Guaranty and Declaration
Copyright
Hangzhou Junce Instruments Co., Ltd. all right reserved.
Trademark Information
JUNCTEK is a registered trademark of Hangzhou Junce Instruments Co., Ltd.
Notices
JUNCTEK products are covered by P.R.C. patents, issued and pending.
This document replaces all previously published documentation.
Contact Us
If you have any problem or requirement when using our products or this
manual, please contact JUNCTEK.
E-mail: [email protected]
Website: www.junteks.com

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Safety Requirement
General Safety Summary
Please review the following safety precautions carefully before putting the
meter into operation so as to avoid any personal injury or damage to the meter
and any product connected to it. To prevent potential hazards, please follow
the instructions specified in this manual to use the meter properly.
Observe All Terminal Ratings
To avoid fire or shock hazard, observe all ratings and markers on the meter
and check your manual for more information about ratings before connecting
the meter.
Use Proper Over-voltage Protection
Ensure that no over-voltage (such as that caused by a bolt of lightning) can
reach the product. Otherwise, the operator might be exposed to the danger of
an electric shock.
Do Not Operate Without Covers
Do not operate the meter with covers or panels removed.
Do Not Insert Anything Into the Air Outlet
Do not insert anything into the air outlet to avoid damage to the meter.
Avoid Circuit or Wire Exposure
Do not touch exposed junctions and components when the unit is powered on.
Do Not Operate With Suspected Failures
If you suspect that any damage may occur to the meter, have it inspected by
JUNCTEK authorized personnel before further operations. Any maintenance,
adjustment or replacement especially to circuits or accessories must be
performed by JUNCTEK authorized personnel.
Provide Adequate Ventilation
Inadequate ventilation may cause an increase of temperature in the meter,
which would cause damage to the meter. So please keep the meter well
ventilated and inspect the air outlet and the fan regularly.
Do Not Operate in Wet Conditions
To avoid short circuit inside the meter or electric shock, never operate the
meter in a humid environment.

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Do Not Operate in an Explosive Atmosphere
To avoid personal injuries or damage to the meter, never operate the meter in
an explosive atmosphere.
Keep Meter Surfaces Clean and Dry
To avoid dust or moisture from affecting the performance of the meter, keep
the surfaces of the meter clean and dry.
Prevent Electrostatic Impact
Operate the meter in an electrostatic discharge protective environment to
avoid damage induced by static discharges. Always ground both the internal
and external conductors of cables to release static before making connections.
Handle with Caution
Please handle with care during transportation to avoid damage to keys, knobs,
interfaces, and other parts on the panels.
Notices
1. Do not exceed the voltage and current range of the meter, otherwise the
meter will be damaged.
2. The positive and negative poles cannot be reversed, and the reverse
connection cannot be handled correctly.
3. The shell of the meter is fragile and easy to corrode. Please don't hit or
close to chemicals to avoid corrosion.
4. Storage temperature: -25~50℃, and keep the meter in a dry environment.
5. Do not attempt to disassemble the meter， it will void the warranty. There are
no user-serviceable parts inside the meter. Repairs can only be made through
designated repair outlets or sent back to the factory.
6. The display screen is a fragile device, please do not touch or bump it .
Please avoid children playing with the meter. When there is dirt on the LCD
surface, wipe it carefully with a soft cloth.
7. Please do not move the meter violently to avoid causing irreparable
damage to the internal circuit. If the meter does not work properly, please
contact the supplier!

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Contents
Guaranty and Declaration ..................................................................... I
Safety Requirement .............................................................................. II
General Safety Summary ...................................................................................II
Notices ................................................................................................................. III
Inspection ...............................................................................................2
Chapter 1 Overview .............................................................................. 3
1.Brief Introduction ..............................................................................................3
2.Dimensions ....................................................................................................... 4
3.Specification ..................................................................................................... 6
Chapter 2 Meter Introduction ............................................................... 8
1. Introduction of display module ......................................................................8
2.Introduction of the measurement module .................................................. 10
3.Introduction of the Sampler.......................................................................... 12
4. Introduction of the display interface ........................................................... 13
Chapter 3 Basic Operation of the Meter ...........................................16
1.System settings ..............................................................................................16
2.Wiring method ................................................................................................ 23
3.Communication Protocol Control ................................................................ 26
4.Mobile Control ................................................................................................ 32
Chapter 4 Troubleshooting .................................................................52
Chapter 5 More Product Information ................................................ 53
Chapter 6 Contact Us ......................................................................... 54
Appendix 1: Interface English and Abbreviations ............................ 55

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Inspection
When you get a new KH-F series coulometer, it is recommended that you
inspect the meter according to the following steps.
Inspect the Packaging
If the packaging has been damaged, do not dispose the damaged packaging
or cushioning materials until the shipment has been checked for completeness
and has passed both electrical and mechanical tests. The consignor or carrier
shall be liable for the damage to the meter resulting from shipment. We would
not be responsible for free maintenance/rework or replacement of the meter.
Check the Contents
Please check the contents according to the packing lists. If the meter is
damaged or incomplete, please contact your JUNCTEK sales representative.
Host
KH-F series of Measurement module
1pc
KH-F series of display module
1pc
KH-F series of the Sampler
1pc
Accessory
5m communication cable
1pc
Temperature sensor
1pc
4P connection cable
1pc
3P connection cable
1pc
3P power socket
1pc
Quick guide
1pc
Inspect the Meter
In case of any mechanical damage, missing parts, or failure in passing the
electrical and mechanical tests, contact your JUNCTEK sales representative.

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Chapter 1 Overview
1.Brief Introduction
The KH-F series multifunctional voltage and current meter is a new type of
coulomb meter that can measure various parameters such as voltage, current,
power, charging and discharging capacity, watt-hour, and more. It also has
multiple protection functions such as overvoltage protection, undervoltage
protection, overcurrent protection, over-power protection, over-temperature
protection, and timed protection. The instrument can automatically identify the
direction of charging and discharging currents and can monitor the battery
capacity in real-time. It features a 2.4-inch high-definition color screen, which
provides more comprehensive display information. The mobile app can control
the instrument via bluetooth wireless communication, enabling real-time
viewing of voltage and current curves and supporting data export. The
firmware can be updated for free for life.

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2.Dimensions
Dimension of display module
Hole bitmap of display module
Note: display module inlay hole size: 85.1 *
58.1mm
Dimension of measurement module
Hole bitmap of measurement module
Dimension of the 100A sampler
Hole bitmap of the 100A sampler
Dimension of the 400A sampler
Hole bitmap of the 400A sampler

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Dimension of the 400A sampler
Hole bitmap of the 600A sampler

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3.Specification
Model
KH110F
KH140F
KH160F
Sampling method
The Shunt
The Shunt
The Shunt
Voltage measurement range
(External power supply)
0-120V
0-120V
0-120V
Voltage measurement range
(Self-powered)
10-120V
10-120V
10-120V
Voltage resolution
0.01V
0.01V
0.01V
Current measurement range
0~100A
0~400A
0~600A
Current resolution
0.01A
0.1A
0.1A
Relay
Optional
Temperature measurement
range
-20-120℃
Capacity display range
0%~100%
Power measurement range
0~72KW
Power resolution
0.01W
Ampere-hour measurement
range
0~9999.99AH
Capacity resolution
0.001AH
Watt-hour measurement range
0~9999.99kWH
Watt-hour resolution
0.001WH
Time measurement range
0~999:59:59S
Time resolution
1 second
Bluetooth communication
distance
Up to 10 meters (No obstacle)
Voltage accuracy
±1%+2 digits
Current accuracy
±1%+0.02A
±1%+0.01A
±1%+0.01A
Sampling rate
1 time / second
Measurement module
power consumption
About 0.4W
Display module power
consumption
About 0.5W
Over power protection
0-99999.99W
Charging over current protection
100A/400A/600A
Discharging over current
protection
100A/400A/600A
Over voltage protection
0~120V
Under voltage protection
0~120V
External over temperature
protection
0-120℃
Protection recovery time
0-99s
Screen-off time
0-60s/I=0 and time>20s
Delay time setting
0-99S

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Communication address
P01-P99, 99 in total

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Chapter 2 Meter Introduction
1. Introduction of display module
Figure 2-1-1 KH-F series display module diagram
Table 2-1-1 KH-F series display module diagram instructions
No.
Description
No.
Description
1
LCD screen
4
【▼】button
2
【SET】button
5
【OK】button
3
【▲】button
6
Communication port
(1).LCD screen
A 2.4-inch TFT color LCD display screen shows the menu of current functions
and settings of parameters, etc.
(2).【SET】button
Pressing the【SET】button briefly can quickly switch to the settings interface;
while on the main interface, pressing and holding the【SET】button can select
the address and use the【▲】【▼】buttons to quickly adjust the address.
(3).【▲】button
When setting parameters, it is used to change the parameters; when in system
settings, pressing the 【▲】button can select the corresponding system
settings; on the main interface, long-pressing the 【▲】button can pop up a
current zero-point saving window to remember the zero-point current state.
Note: When the current is zero, perform the zero-point saving operation. Do
not operate when it is not zero.
(4).【▼】button
When setting parameters, it is used to change the parameters; when in system
settings, pressing the
【▼】
button can select the corresponding system settings;
on the main interface, long-pressing the【▼】button can turn off the display
screen. While the screen is off, do not press other buttons. Pressing 【▼】
button again can turn the display screen back on.
(5).【OK】button

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On the main interface, pressing the【OK】button briefly can control the relay on
and off if there is one; long-pressing the【OK】button can quickly lock or unlock
the buttons.
(6).Communication port
Used to connect with the measurement module.

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2.Introduction of the measurement module
Figure 2-2-1 KH-F series measurement module diagram
Table 2-2-1 Instructions diagram of the KH-F series measurement module
No.
Description
No.
Description
1
Indicator light
5
485 communication
display interface
2
2wires&3wires switch
6
Relay output
control interface
3
Power supply interface
7
Sampler interface
4
485 communication
connection interface
8
External temperature
measurement interface
(1).Indicator light
The indicator light represents the working status. Slow flashing indicates
normal power supply and normal measurement.
(2).2-wire/3-wire power selection switch
The switch can be toggled to select external power or self-power. When the
switch is toggled up to 2W, it is suitable for self-power, and the voltage
measurement range is 10-120V. When the switch is toggled to 3W, it is
suitable for external power, and the external power voltage is 10-80V. For KH-F,
the voltage measurement range is 0-120V.
(3).Power interface
There are a total of three power interfaces, including the battery positive
interface (Vsns), the external power positive interface (VEXT), and the external
power negative interface (GND).
(4).RS-485 communication connection interface
Used for protocol communication, and can also be used to connect another
measurement module for multi-machine communication. From left to right,
they are: B, A, GND, NC.

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(5).Display screen communication interface
Connected to the display module,when the measurement module is powered,
this communication interface is live. From left to right, they are: B, A, GND,
+5V.
(6).Relay output control interface
The relay output control interface can be used with the relay. From left to right,
they are: GND, OUT, VEXT.
(7).Sampler interface
Connected to the sampler, used to detect current. From left to right, they are:
VCC, GND, ISNS+, ISNS-.
(8).External temperature measurement interface
Connected to the temperature sensor, used to measure external temperature.
From left to right, they are: TSNS, GND.

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3.Introduction of the Sampler
Figure 2-3-1 KH-F series of the Sampler diagram
Table 2-3-1 KH-F series of the Sampler diagram instructions
No.
Description
No.
Description
1
The Sampler interface
(1).Sampler interface
Connected to the sampler interface of the measurement module for measuring
current.

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4. Introduction of the display interface
Figure 2-4-1 KH-F series display interface diagram
Table 2-4-1 KH-F series display interface diagram instructions
No.
Description
No.
Description
1
Output status
8
Data record
2
Keypad lock status
9
Current direction
3
Actual time
10
External temperature
4
Communication address
11
Battery remaining capacity
5
Communication signal
indication
12
Remaining capacity
6
Power
13
Measured current value
7
Estimated time
14
Measured voltage value
(1). Output status
Short press the 【OK】button to control the on/off status of the output.
(2). Key lock status
The current status display indicates that the button can be operated. After
long-pressing the OK button, it will display to indicate that the button is
locked.
(3). Actual time

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Represents the current actual time.
(4). Communication address
The communication address range is P01-P99, with P01 representing the
current communication address as P01, and the data viewed is for the P01
address.
(5). Communication signal indication
The current graphic represents that the display module and measurement
module are connected normally. When there is a red × in the graphic, it
indicates a communication interruption. Check whether the communication
address is correct, and then check whether the communication line is in good
contact.
(6). Power
Displays the actual measured power value in watts.
(7). Estimated time
Under current capacity and current discharge current/load power, shows how
long the device can still operate in the future. Under current capacity and
charging current, shows how long it will take to fully charge. When the current
changes from greater than 0A to 0A, the expected time will remain the same
for one minute before changing to "---h:--m." When the current changes from
0A to greater than 0A, the expected time will remain "---h:--m" for one minute
before updating to the calculated time.
(8). Data record
Displays the percentage of data storage space used with a progress bar.
When the progress bar is full, it means the data record storage space is full
and the data needs to be cleared, otherwise no data will be recorded. The
symbol "⏸" represents that data record is turned off, while "▶" represents that
data record is turned on.
(9). Charging and discharging current direction
When the current color is green and the charging symbol ○＋ is displayed, it
indicates that the device is charging and the remaining capacity is increasing.
When the current color is blue and the discharging symbol is ○- displayed, it
indicates that the device is discharging and the remaining capacity is
decreasing.
(10). External temperature
Displays the ambient temperature, currently showing 13℃, which represents
the temperature of the environment where the external sensor is located.
(11). Battery remaining capacity graphical display
Displays the remaining battery capacity in a graphical and more intuitive way.
When on the main interface, the battery remaining capacity graphic displays in
red when the remaining capacity percentage is less than or equal to 20%, and
in green when the remaining capacity percentage is greater than 20%.

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(12). Remaining capacity
Represents the remaining capacity of the battery through charge and
discharge, remaining capacity = preset battery capacity -accumulated capacity
(13). Measured current value
Represents the actual current value measured by the sampler.
(14). Measured voltage value
Represents the voltage value measured by the voltage measurement interface
in the power supply interface.